28423284523 has 4 divisors (see below), whose sum is σ = 29191481440. Its totient is φ = 27655087608.

The previous prime is 28423284503. The next prime is 28423284529. The reversal of 28423284523 is 32548232482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28423284523 - 2¹³ = 28423276331 is a prime.

It is a super-2 number, since 2×28423284523² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28423284523.

It is not an unprimeable number, because it can be changed into a prime (28423284529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384098403 + ... + 384098476.

It is an arithmetic number, because the mean of its divisors is an integer number (7297870360).

Almost surely, 2^28423284523 is an apocalyptic number.

28423284523 is a deficient number, since it is larger than the sum of its proper divisors (768196917).

28423284523 is an equidigital number, since it uses as much as digits as its factorization.

28423284523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768196916.

The product of its digits is 737280, while the sum is 43.

The spelling of 28423284523 in words is "twenty-eight billion, four hundred twenty-three million, two hundred eighty-four thousand, five hundred twenty-three".